sapsago

from WordNet (r) 3.0 (2006)

sapsago
    n 1: a hard green Swiss cheese made with skim-milk curd and
         flavored with clover

from The Collaborative International Dictionary of English v.0.48

Sapsago \Sap"sa*go\, n. [G. schabzieger; schaben to shave, to
   scrape + zieger a sort of whey.]
   A kind of Swiss cheese, of a greenish color, flavored with
   melilot.
   [1913 Webster]